负荷模型对电力系统失步振荡特性的影响

目的]负荷作为最终消耗有功功率的部分,对系统的稳定起着十分重要的影响,为此,文章研究不同负荷模型对电力系统失步振荡特性的影响.方法]以某大型电网区域间断面为研究对象,采用中国电力科学研究院的BPA程序,综合分析不同负荷模型对振荡中心及失步解列装置动作的影响.结果]结果表明:采用ZIP静态负荷模型,线路Ucosφ曲...

Influence of Load Model to Out-of-step Oscillation Characteristics of Power System

  Introduction  Load， as the part that ultimately consumes active power， has a very important impact on the stability of the system. Therefore， the influence of different load models on out-of-step oscillation characteristics of power system is studied in this paper.  Method  This paper took a large grid’s regional discontinuity as the research target to comprehensively analyze the effects of different load models on the oscillation center and action of out of step splitting device using BPA program developed by China Electric Power Research Institute.  Result  The simulation results show when using the ZIP static load model， the line Ucos curve demonstrates the best periodic integrity ， as the proportion of induction motor type load increases， the Ucos curve’s periodic integrity becomes worse， it even leads to a subversive change in the conclusion whether the out of step splitting device can react. In addition， different load models also cause the oscillation center migration.  Conclusion  Therefore， the credibility of simulation results can only be guaranteed by using the most realistic load model.